Π polarizability Meeting Oct 27, 2021

From GlueXWiki
Jump to: navigation, search

Meeting Time And Location

09:30 EST (JLab time) Weekly Meeting

REMOTE during Covid-19

Connecting

You can connect using BlueJeans Video conferencing (ID: 949 429 419). (Click "Expand" to the right for details -->):

  1. Make sure you have created a BlueJeans account via your JLab CUE account using this link:

  2. Meeting ID: 949 429 419
    • (you may need to type this in, depending how you connect)

  3. If connecting via Web Browser: click this link (no passcode is needed):

  4. If connecting via iOS or Android App:
    • Use your JLab e-mail address to log in and then enter the meeting ID given above to join the meeting

  5. If connecting via Phone: Dial one of the following numbers and then enter the meeting ID above and hit "#" or "##"

  6. If connecting via Polycom unit:
    • Dial 199.48.152.152 or bjn.vc
    • Enter meeting ID above



Action Items

  1. Follow up on procurement for electronic enclosures.
  2. Develop a plan for beam TOF trigger tests

Preliminary Agenda

  1. Previous CPP meeting: Oct 20, 2021
  2. Announcements
  3. Action Items
  4. Software/Calibration for CPP (David, Alex and Sean)
  5. AI for Experimental Controls testing during CPP
  6. MWPC Testing
  7. Slow Controls (Beni)
  8. hdgeant4 updates (Mark)
  9. TOF Trigger (Simon)
  10. GlueX Data Analysis
  11. CPP Simulations
  12. PID + AI
  13. Other business
  14. Next meeting

Minutes

Attending: Albert, Alex, Andrew, Beni, David, Ebode, Elton, Gary, Ilya, Mark, Nikhil, Rory, Simon

  1. Previous CPP meeting: Oct 20, 2021
  2. Announcements
    • Delays in beam to Hall D is putting pressure on the schedule. Beni mentioned that there has been an incident in Hall A that has them down and may delay the energy change. We need to prepare a plan for a trigger test in case any time become available.
    • CPP and NPP Experiment Configuration
    • Elton has created an index wiki page that can be used to place all the production experimental information. We should use it to centralize the information already available.
    • Mark [Noted at end of meeting] There are duplicate calendar entries for this meeting. Elton will delete his series, leaving David's.
  3. Action Items
    • Rory will check that Walt has billed JLab.
    • Ilya agreed to develop a draft plan for the TOF trigger tests
  4. Software/Calibration for CPP (David, Alex and Sean)
    • Alex: Sean developed a dummy translation table for the EEL test setup and Alex has checked it.
    • He has written a test FMWPC_online plugin using the translation table and showed that occupancy plots reproduce those generated by mwpc_checks script.
    • Created a FMWPC_hits objects, which contain "calibrated hits" from the pulse parameters provided by the firmware. ADC integrals -> dE, TDC -> ns. He needs input from the group to develop further
    • Discussion: Probably will create some "clusters" of hits that contain dE info + position + size information. These clusters would be used to match up with tracking information. Alex will work on a clustering algorithm.
    • David: Has developed some code for hdview2 to show FMWPC hit information on a git branch. Needs to finish up and generate a pull request.
  5. AI for Experimental Controls testing during CPP
    • Data provided by Andrew seems to be all muons and no pions. He will regenerate the files to be checked by David and Nikhil.
  6. MWPC Testing
    • FMWPC Log Book
    • See https://logbooks.jlab.org/entry/3932878 Summary of efficiency estimates]
    • Five MWPCs can run with "zero" baseline threshold. Denethor needs a Th=200.
    • Galadriel and Frodo need Th > 500 due to large electronic noise.
    • Good news is that design seems to be sound. Rory suspects that the two "noisy" chambers have some grounding issues. He will investigate further when he has a chance to come to JLab.
    • Elton: What is the basis for the nominal setting of HV=1765 V? Rory: Using the small prototype, the 55Fe source was used to establish the gain at UMass of 10^5 for HV=1800 V. However, the premix gas at JLab is somewhat different and somewhat higher gain. Adjusting for this difference, Rory expects that the JLab gas conditions yield a gain of 10^5 at a HV=1765 V.
  7. Slow Controls (Beni)
  8. hdgeant4 updates (Mark)
  9. TOF Trigger
    • Ilya will draft a plan for testing the TOF trigger if we can find time this fall.
  10. GlueX Data Analysis
  11. CPP Simulations (Simon)
    • Has added trigger scintillators (labeled ctof) to the geometry, sensitive volumes in geant4, mcsmear, class of fmwpc in reconstruction.
    • Plans to submit a pull request soon.
  12. PID + AI
  13. Other business
    • Need to finalize the configuration of MWPCs next week for discussions with Tim/Stephanie
  14. Next meeting
Retrieved from "https://halldweb.jlab.org/wiki/index.php?title=Π_polarizability_Meeting_Oct_27,_2021&oldid=108315"